1 /* 2 * Copyright (C) 2007 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.collect.testing.testers; 18 19 import static com.google.common.collect.testing.features.CollectionFeature.ALLOWS_NULL_VALUES; 20 import static com.google.common.collect.testing.features.CollectionFeature.SUPPORTS_ADD; 21 import static com.google.common.collect.testing.features.CollectionSize.ZERO; 22 23 import com.google.common.collect.testing.features.CollectionFeature; 24 import com.google.common.collect.testing.features.CollectionSize; 25 26 import java.lang.reflect.Method; 27 28 /** 29 * A generic JUnit test which tests add operations on a set. Can't be 30 * invoked directly; please see 31 * {@link com.google.common.collect.testing.SetTestSuiteBuilder}. 32 * 33 * <p>This class is GWT compatible. 34 * 35 * @author Kevin Bourrillion 36 */ 37 public class SetAddTester<E> extends AbstractSetTester<E> { 38 @CollectionFeature.Require(SUPPORTS_ADD) 39 @CollectionSize.Require(absent = ZERO) testAdd_supportedPresent()40 public void testAdd_supportedPresent() { 41 assertFalse("add(present) should return false", getSet().add(samples.e0)); 42 expectUnchanged(); 43 } 44 45 @CollectionFeature.Require(value = {SUPPORTS_ADD, ALLOWS_NULL_VALUES}) 46 @CollectionSize.Require(absent = ZERO) testAdd_supportedNullPresent()47 public void testAdd_supportedNullPresent() { 48 E[] array = createArrayWithNullElement(); 49 collection = getSubjectGenerator().create(array); 50 assertFalse("add(nullPresent) should return false", getSet().add(null)); 51 expectContents(array); 52 } 53 54 /** 55 * Returns the {@link Method} instance for 56 * {@link #testAdd_supportedNullPresent()} so that tests can suppress it. See 57 * {@link CollectionAddTester#getAddNullSupportedMethod()} for details. 58 */ getAddSupportedNullPresentMethod()59 public static Method getAddSupportedNullPresentMethod() { 60 return Platform.getMethod(SetAddTester.class, "testAdd_supportedNullPresent"); 61 } 62 } 63